Find some spelling errors:

	interupts --> interrupts
	lenth --> length
	stoped --> stopped
	contoller --> controller
Signed-off-by: Guofeng Yue <yueguofeng@hisilicon.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>